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Finding the Fourth Proportional to 158,440.80, 218,647.02 and 86,820.63

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Solution

The fourth proportional to 158,440.80, 218,647.02 and 86,820.63 is: 119,811.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,440.80 : 218,647.02 = 86,820.63 : x
  2. Step 2: Convert to fraction form
    158,440.80/218,647.02 = 86,820.63/x
  3. Step 3: Cross multiply
    158,440.80x = 218,647.02 × 86,820.63
  4. Step 4: Simplify right side
    158,440.80x = 18,983,072,024.02
  5. Step 5: Solve for x
    x = 18,983,072,024.02/158,440.80
  6. Step 6: Final answer
    x = 119,811.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.